Improvement in steam-pumps



@timidi tant glainttittwe. mwneseognmxmw www@ a f s, tiene JOHN S. BARDEN, OF PROVIDENOMiRHODE ISLAND, ASSIGNOR TO HIMSELF ANI) DANIEL N. PIOKERING, OF BOSTON, MASSACHUSETTS. y

IMPRQvnMnN'i' IN STEAM-PUMPS.

The Schedule refen'ed to in these Letters Patent and making part of the same.

WOP- To all persons to whom these presen-ts lmtl/y come: ofthe Cy1indrA Furthermorei-,WO ports (y1-passages, Be it known ,that I, J 011x S. .Banning of the city o 11, lead from the space Z, through the partition a, and and county of Providence, and State of Rhode Island, into the two chambers c c, such passages, o, m, and p, have made a new and useful invention, having refe-rbeing arrL nged as represented in ng. 4. ence to Semi-Rotative Pumping-Engines, to be oper- A cylindrical piston-valve, G, is arranged within the ated by steam or other suitable elastic motor; and I space l, and is to fit thereto and move therein, as a do'hereby declare the same to be fully described inthe piston-head usually iits'to and moves within a cylinder. following` specification, and represented in the accom- A This piston-valve is constructed of abody, q', andan panying drawings, of whichouter cylindrical tubo or case, 1', which are arranged Figure 1 is a front elevation, concentrically, and formed as represented in figs. 7, 8, Figure 2, a side view of a pumpingengine of my im- 9, 10, 11, and 12. proved construction. In the top of the case r is a rectangular opening, s, Figure 3 is a vertical section, taken through and in and through its bottom are three other such openings,

line ofthe axis of the shaft of the engine. tu yv. Ihere is also a groove, fw, made in its side, to

Figure 4 is a transverse and vertical section, taken receive the end of a stud or screw,.:v, which, with the through the steam-engine. groove, limits the extent of longitudinal movement of Figure 5 is a similar' section of the pump. the piston-valve, and holds it in its right position. Figure Gis a horizontal section, taken through tbe In and around the part q, are two grooves, rw x,

shaft-axis. which are directly over the ports t u. Furthermore, Figiue 7 is a side view, there is a small chamber, y, in the bottom of the port Figure 8 is a bottom view, and q, which is a continuation of the opening u, leading Figure 9, a top view of the shell or outer case of the through the shell lr. The opening s is continued into pStOu-Valvethe body q, and communicates with the annular pas- Figure l0 is a side elevation, sages 'w x, by horizontal passagesy y. Figure 11, a bottom view, and Over the porti of the steam-chest are two Valve- Figuie 12, a top view of the body-part of such valve. chambers, c a, within each of which is a valve, bl, pr0- The cylinder of the steam-engine is shown at A, as vided with a long stem, c. The two valve-chambers composed of a cylindrical vessel, having its interir communicate byacross-passage,e',intowhichthe steam space divided, by two partitions, a b, and a cylinder, d, to operate the engine is to be led through a passage, ll. ip'to two sectional chambers, c c. The cylinder l is fixed A port or passage, f, leads from the middle of the pason the shaft B concentrically, and such shaft extends sage e', into Ithe space Z. axially through the cylinder A, in manner as repre- Thestemscl c1, of thevalvesbl b1, extenddownthrough sented. the space Z, aud into the chambers c c, and directly over Packings, e c, to rest against the periphery of the these pistons, so as to be raisedealternately by the said cylinder d, are inserted in the divisional partitions a l). pistons during their oscillatory movements.

Two pistons or wings, C D, extend diametrically from The shaft of the engine extends a short distance into the cylinder d, to the inner periphery of the case A. a cylindrical pump-case, H, fixed to the engine-cylinder There are also tw'o passages, f and g, leading through bya neck, I, and arranged with respect to it in manthe pistons, the cylinder d, and the shaft B. These ner as represented. On the part of the shaft B, which passages go parallel to one another through the shaft enters the interior space` g' of the pump-case, 1s a B and the cylinder al. Thence, each goes through the ring, I', which is fixed to and so as to be y revolved by two pistons in opposite directions, in manner as shown the shaft. This ring, and the end of the' shaft B, abut in fig. 4, the same being so as to open communication directly against a cylinder, K, which is fastened to the between the space over each piston with that below outer head h of the pump-case. the other piston. Within the pump-case, and so as to radiate in oppo- Within the partition 4b is a faucet or plug, E, prosite directions from the ring I and the cylinder K, and vided with a discharge-passage, h, and two inlets, 'i i, fastened to the said ring, are two pistons or wings, z k', arranged in it in manneras represented. To this faucet which extend to the'inner periphery of the case. Thesev two branch-passages, la 7:, lead through the partition l), pistons are arranged in sectoral chambers Z- m, which to the extreme lower paits of the two chambers c c, the are separated from two other sectoral chambers, n o', pmpose of the faucet and these passages L L being to by (partitions, pg, arranged and formed as represented.

enable the `chambers to be freed from water resulting p'enin gs, c s t u', provided with valves, 'u' w x y',

fromthe coudensation'of steam inthe chambers. arranged as shown in iig. 5, are made through the parg On the cylinderAis acylindrical valve-chest, F,who`se titions so as to open communication between the cham? interior, Z, is a cylindrical space, closed at its ends. bers Z m n o. y An eduction-passage, m, leads out of the middle of An induction-passage, z, leads into the chamber o the bottom of. this space l, and into a discharge-pas!" and there is an eduction-passage, a2, leading out oftheY i ,f sagef'n, going through the partition a, andthe rear head chamber n.

There are also -two passages, if c2, leading through the block l. Each of such passages opens communication between the spaee below one piston and that above the other of the pump-chambers l m. By the employment of the stationary cylinderK, arranged with the partitions 1"-(1, the passages of communication, the shaft B, and the pistons i" L", and their connecting annulus I, l am enabled to make the passages b'` c2 much larger than I could were I toinake them through the shaft B. '.lhe'same may be said with respect to my arrangement of the passages 7" q of the steam-engine, as, by arranging them in the pistons OD, and through the shaft B and cylinder (l thereof, they may be made much larger than they could be were they to be run through the part (l and the shaft B, for in such case they would have to be very narrow, on account of the pistons, when at work, approaching so closely to the partitions t b.

\Vhen steam is let into the passage of the steamchest of the engine, and the shaft B is turned so as to cause one of the pistons C to rise and throw oiiits valve b, steam will pass through the seat of such valve into the steam-chest Y, and, by acting' against the piston Gr, will move it endwise within the chamber I, so as to enable steam to pass through the passage f', and into the passages s, y, l11,', and 11:, of the piston-Valve G. In this case the annularl passage a" will beidirectly over the port o leading to the raised piston. The passage yuf will Aopen communicationbetween the port p and the eduction-passage on. The steam will rush, through the passage o, into the spaee over the piston c, and will also pass, through the passage j, into the space below the piston D. The steam, acting against the pistons, Will move them in opposite directions, until the piston D may be thrown up against the valve-stem c1, so as to raise the valve b thereof. As soon as this may take place,'the steam will enter the chamber l and drive the piston-valve. in the direction opposite lto which it was previously moved, so as to cause the steam to produce a reverse movement of the pistons. The exhaust steam of the chamber lwill i'low through the valve-stem passage a" leading from the spaee I, into the space over the piston C. Such passage a* should have a diameter a little greater than that of the valve-stem. The same may be said with respect to the passage b" of the other valve-stem. Each passage, however, should be of such diameter as to discharge the exhaust steam'so slowly as to cause the 1 iston-valve to be cushion'ed7 by the' steam, while the valve may be in movement, the cushioning of the valve being to prevent its momentum from breaking its stop or stud, fc, or otl'ierwise doing damage.

` The pistons will be moved` with oscillatory movements, so as to impart to the shaft B a reciprocating rotative motion, and cause it to work the two pistons of the pump, which is a double-acting lifting and forcepump.

iVhat 1 claim as my invention in the above-described punniiing-engine, is as follows, viz

The combination of the stationary cylinder K, and its passages b2 ci, with the pump-pistons 17h' connected with the shaft B, and arranged in the pump-case, provided with valves, and partitions, and induction and eduction-conduits, as explained.

Also, the arrangement of the steam-engine and the pump, and their connection by the neck 1, and the shaft B, as described.

JOHN S. BARDEN.

lWitnesses R. H. EDDY, F. P. HALE, Jr. 

